Sofa



FIG. 1 is a top-front-left perspective view of a sofa showing my new design;

FIG. 2 is a bottom-rear-right perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a left elevational view thereof;

FIG. 8 is a right elevational view thereof;

FIG. 9 is a perspective cross-sectional view taken along line 9-9 in FIG. 7 ; and,

FIG. 10 is a perspective cross-sectional view taken along line 10-10 in FIG. 3 .

The broken lines in the drawings depict stitching and form a part of the claimed design. 

CLAIM The ornamental design for a sofa, as shown and described. 